Aniline-2,4-diaminophenol copolymer, preparation method and application thereof in removing chromium ions in water body

A technology of diaminophenol and diaminophenol hydrochloride, which is applied in the field of copolymers, can solve the problems of serious regeneration loss, small adsorption capacity, and high price, and achieve the advantages of less dosage, convenient adsorption operation, and stable properties Effect

Inactive Publication Date: 2010-06-09
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated carbon adsorbent has a good treatment effect, but it is expensive, and the regeneration loss is serious; agricultural by-products, industrial waste, and biological adsorbents come from a wide range of sources, but there are disadvantages such as small adsorption capacity, improper treatment, and easy to cause secondary pollution.

Method used

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  • Aniline-2,4-diaminophenol copolymer, preparation method and application thereof in removing chromium ions in water body
  • Aniline-2,4-diaminophenol copolymer, preparation method and application thereof in removing chromium ions in water body
  • Aniline-2,4-diaminophenol copolymer, preparation method and application thereof in removing chromium ions in water body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1) Dissolve aniline monomer and sulfuric acid in deionized water, add 2,4-diaminophenol hydrochloride under stirring condition, wherein the molar ratio of aniline, sulfuric acid and 2,4-diaminophenol hydrochloride is 25: 62.5:1;

[0018] 2) Ammonium persulfate and sulfuric acid are made into an aqueous solution, wherein the molar ratio of ammonium persulfate to sulfuric acid is 0.56: 1, so that the molar ratio of ammonium persulfate and the aniline monomer in the solution obtained in step 1) is 1.4: 1;

[0019] 3) Slowly add an equal volume of ammonium persulfate and sulfuric acid solution to the reaction solution prepared in the above step 1), stir magnetically, and react for 8 hours;

[0020] 4) The obtained reactant is first washed with dilute sulfuric acid, suction filtered until the filtrate is colorless, and then rinsed several times with deionized water;

[0021] 5) The solid matter obtained in the above step 4) was dried in a vacuum oven at 102° C. for 10 h to ...

Embodiment 2

[0024] 1) Dissolve aniline monomer and sulfuric acid in deionized water, add 2,4-diaminophenol hydrochloride under stirring condition, wherein the molar ratio of aniline, sulfuric acid and 2,4-diaminophenol hydrochloride is 100: 250:1;

[0025] 2) Ammonium persulfate and sulfuric acid are made into an aqueous solution, wherein the molar ratio of ammonium persulfate to sulfuric acid is 0.56: 1, so that the molar ratio of ammonium persulfate and the aniline monomer in the solution obtained in step 1) is 1: 1;

[0026] 3) Slowly add an equal volume of ammonium persulfate and sulfuric acid solution to the reaction solution prepared in the above step 1), stir magnetically, and react for 3 hours;

[0027] 4) The obtained reactant is first washed with dilute sulfuric acid, suction filtered until the filtrate is colorless, and then rinsed several times with deionized water;

[0028] 5) The solid matter obtained in the above step 4) was dried in a vacuum oven at 90° C. for 10 h to obt...

Embodiment 3

[0030] 1) Dissolve aniline monomer and sulfuric acid in deionized water, add 2,4-diaminophenol hydrochloride under stirring condition, wherein the molar ratio of aniline, sulfuric acid and 2,4-diaminophenol hydrochloride is 20: 50:1;

[0031] 2) Ammonium persulfate and sulfuric acid are made into an aqueous solution, wherein the molar ratio of ammonium persulfate to sulfuric acid is 0.56: 1, so that the molar ratio of ammonium persulfate and the aniline monomer in the solution obtained in step 1) is 2: 1;

[0032] 3) Slowly add an equal volume of ammonium persulfate and sulfuric acid solution to the reaction solution prepared in the above step 1), stir magnetically, and react for 12 hours;

[0033] 4) The obtained reactant is first washed with dilute sulfuric acid, suction filtered until the filtrate is colorless, and then rinsed several times with deionized water;

[0034] 5) The solid matter obtained in the above step 4) was dried in a vacuum oven at 110° C. for 10 h to obt...

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Abstract

The invention discloses an aniline-2,4-diaminophenol copolymer, a preparation method thereof and application thereof in removing chromium ions in a water body. The preparation method comprises the following steps of: adding an appropriate amount of oxidant ammonium persulfate into aniline, sulfuric acid and solution of 2,4-diaminophenol hydrochloride monomer at room temperature for polymerization; filtering the mixture after the polymerization; successively washing the mixture with dilute sulfuric acid and ultrapure water until a filter liquor is colorless; drying the mixture to obtain a nano copolymer shown as a scanning electron micrograph; adding an appropriate amount of the copolymer into chromium-containing simulated wastewater at room temperature; oscillating the mixture for 24 hours; filtering the mixture; and diluting a filter liquor, and then determining chromium concentration by a flame atomic absorption method. The result shows that: the copolymer has excellent adsorption performance to the chromium ions under a condition of acidic pH.

Description

technical field [0001] The invention relates to a copolymer, especially an aniline-2,4-diaminophenol copolymer and its chemical preparation method, and also relates to the application of the copolymer in adsorbing and removing chromium ions in water. Background technique [0002] With the development of the economy, the chromium-containing wastewater discharged from metallurgy, metal processing, electroplating, tanning, paint, pigment and other industries is also increasing. The toxicity of chromium is related to the coexistence of valence states. Among them, hexavalent chromium compounds are not only corrosive to the skin and mucous membranes, but also easy to accumulate in the human body, which is highly toxic and carcinogenic, and even causes death. Among the conventional treatment methods for chromium-containing wastewater, the adsorption method has been widely used due to its advantages of simple operation, quick effect, and recyclability, and efficient and cheap adsorp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02C02F1/28C02F1/62
Inventor 孙立李琴胡秋婵张娅翟建平
Owner NANJING UNIV
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